Climate of London
London features a temperate oceanic climate (Cfb).[1] This gives the city cool winters, warm summers with precipitation fairly evenly distributed all year round. London has a very rich history of meteorological observations, with precipitation records beginning as early as January 1697 at Kew Gardens.[2] Irregular observations were made at multiple locations in the ensuing years. An observing station has been located at Greenwich since 1841, giving London its longest continuous reliable temperature series.[3] Other stations include Heathrow, beginning in 1948,[4] Hampstead, beginning in 1910,[5] Northolt, beginning in 1948,[6] and St James's Park, beginning in 1910.[7]
| London, United Kingdom | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Climate chart (explanation) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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London on a snowy day in 2018.
The highest temperature ever observed in London is 40.2 °C (104.4 °F) provisionally[8] recorded at both Heathrow Airport and St James's Park on 19 July 2022 and the lowest is −16.1 °C (3.0 °F) 1 January 1962.[9] The lowest daily maximum temperature is −8.3 °C (17.1 °F) occurring on 3 occasions: 8 January 1841, 4 January 1867 and 12 January 1987.[10] The highest daily minimum temperature recorded is 25.8 °C (78.4 °F), recorded in Kenley on 19 July 2022.[11] In addition to this, London holds multiple national records, including the record maximum for the months of February, April, May and June.[12]
The city can sometimes experience extremes. Snowfall is an infrequent occurrence in winter, falling on an average of 16 days per year, though infrequently heavy.[13] Thunderstorms are a similarly occurring feature, occurring on average up to 16 days per year.[14] London rarely experiences tornadoes, although an F2 struck Kensal Green on 7 December 2006.
London is vulnerable to climate change in the United Kingdom, and there is increasing concern among hydrological experts that London households may run out of water before 2050.[15]
Classifications
| Climatic scheme | Initials | Description |
|---|---|---|
| Köppen system[16][17] | Cfb | Oceanic climate[lower-alpha 1] |
| Trewartha system[18][19] | Do | Temperate oceanic climate |
| Alisov system[20] | — | Temperate climate[lower-alpha 2] |
| Strahler system[21] | — | Marine west-coast |
| Thornthwaite system[22] | C2 B'1 |
Moist subhumid and mesothermal |
| Neef system[23][24] | — | West side/maritime climate |
Climate data tables
London Weather Centre
| Climate data for London Weather Centre, 2001-2009 seminormals | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average high °C (°F) | 8.5 (47.3) |
8.9 (48.0) |
11.7 (53.1) |
15.7 (60.3) |
18.5 (65.3) |
22.4 (72.3) |
23.6 (74.5) |
23.2 (73.8) |
20.8 (69.4) |
16.1 (61.0) |
11.9 (53.4) |
8.6 (47.5) |
15.8 (60.5) |
| Average low °C (°F) | 5.0 (41.0) |
4.7 (40.5) |
5.8 (42.4) |
8.2 (46.8) |
10.9 (51.6) |
14.1 (57.4) |
15.5 (59.9) |
15.5 (59.9) |
13.7 (56.7) |
10.9 (51.6) |
8.0 (46.4) |
5.4 (41.7) |
9.8 (49.7) |
| Source 1: Weather Online [25] | |||||||||||||
| Source 2: Tutiempo [26] | |||||||||||||
St James's Park - Weather Station near the centre of London
| Climate data for St James's Park WMO ID: 03770; coordinates 51°30′18″N 0°07′52″W; elevation: 5 m (16 ft); extremes 1912–present | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 16.3 (61.3) |
19.7 (67.5) |
24.3 (75.7) |
29.1 (84.4) |
31.7 (89.1) |
34.6 (94.3) |
40.2 (104.4) |
36.1 (97.0) |
32.5 (90.5) |
29.1 (84.4) |
20.6 (69.1) |
16.9 (62.4) |
40.2 (104.4) |
| Record low °C (°F) | −9.4 (15.1) |
−10.0 (14.0) |
−5.6 (21.9) |
−3.3 (26.1) |
−0.6 (30.9) |
3.3 (37.9) |
7.2 (45.0) |
4.4 (39.9) |
1.1 (34.0) |
−3.3 (26.1) |
−3.9 (25.0) |
−7.0 (19.4) |
−10.0 (14.0) |
Heathrow - Airport Weather Station in the suburbs of West London
| Climate data for Heathrow Airport WMO ID: 03772; coordinates 51°28′45″N 0°27′02″W; elevation: 25 m (82 ft); 1991–2020 normals, extremes 1948–present | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 16.0 (60.8) |
20.1 (68.2) |
23.8 (74.8) |
28.5 (83.3) |
31.8 (89.2) |
34.8 (94.6) |
40.2 (104.4) |
37.9 (100.2) |
32.8 (91.0) |
28.8 (83.8) |
18.6 (65.5) |
16.6 (61.9) |
40.2 (104.4) |
| Average high °C (°F) | 8.4 (47.1) |
9.0 (48.2) |
11.7 (53.1) |
15.0 (59.0) |
18.4 (65.1) |
21.6 (70.9) |
23.9 (75.0) |
23.4 (74.1) |
20.2 (68.4) |
15.8 (60.4) |
11.5 (52.7) |
8.8 (47.8) |
15.7 (60.3) |
| Daily mean °C (°F) | 5.6 (42.1) |
5.8 (42.4) |
7.9 (46.2) |
10.5 (50.9) |
13.7 (56.7) |
16.8 (62.2) |
19.0 (66.2) |
18.7 (65.7) |
15.9 (60.6) |
12.3 (54.1) |
8.4 (47.1) |
5.9 (42.6) |
11.7 (53.1) |
| Average low °C (°F) | 2.7 (36.9) |
2.7 (36.9) |
4.1 (39.4) |
6.0 (42.8) |
9.1 (48.4) |
12.0 (53.6) |
14.2 (57.6) |
14.1 (57.4) |
11.6 (52.9) |
8.8 (47.8) |
5.3 (41.5) |
3.1 (37.6) |
7.8 (46.0) |
| Record low °C (°F) | −13.2 (8.2) |
−9.6 (14.7) |
−5.1 (22.8) |
−2.6 (27.3) |
−0.9 (30.4) |
1.5 (34.7) |
5.6 (42.1) |
5.9 (42.6) |
1.8 (35.2) |
−3.3 (26.1) |
−7.0 (19.4) |
−11.8 (10.8) |
−13.2 (8.2) |
| Average precipitation mm (inches) | 58.8 (2.31) |
45.0 (1.77) |
38.8 (1.53) |
42.3 (1.67) |
45.9 (1.81) |
47.3 (1.86) |
45.8 (1.80) |
52.8 (2.08) |
49.6 (1.95) |
65.1 (2.56) |
66.6 (2.62) |
57.1 (2.25) |
615.0 (24.21) |
| Average precipitation days (≥ 1.0 mm) | 11.5 | 9.5 | 8.5 | 8.8 | 8.0 | 8.3 | 7.9 | 8.4 | 7.9 | 10.8 | 11.2 | 10.8 | 111.7 |
| Mean monthly sunshine hours | 61.1 | 78.8 | 124.5 | 176.7 | 207.5 | 208.4 | 217.8 | 202.1 | 157.1 | 115.2 | 70.7 | 55.0 | 1,674.8 |
| Source 1: Met Office [27] | |||||||||||||
| Source 2: KNMI [28][29] | |||||||||||||
Kew Gardens - Weather Station in South West London on the banks of the River Thames
| Climate data for Kew Gardens WMO ID: 99095; coordinates 51°28′55″N 0°17′40″W; elevation: 6 m (20 ft); 1991–2020 normals, extremes 1881–present | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 16.5 (61.7) |
21.2 (70.2) |
24.5 (76.1) |
28.4 (83.1) |
30.3 (86.5) |
34.6 (94.3) |
40.1 (104.2) |
38.1 (100.6) |
33.2 (91.8) |
29.2 (84.6) |
19.4 (66.9) |
16.8 (62.2) |
40.1 (104.2) |
| Average high °C (°F) | 8.6 (47.5) |
9.2 (48.6) |
11.9 (53.4) |
15.1 (59.2) |
18.4 (65.1) |
21.4 (70.5) |
23.8 (74.8) |
23.4 (74.1) |
20.3 (68.5) |
16.0 (60.8) |
11.6 (52.9) |
8.9 (48.0) |
15.7 (60.3) |
| Daily mean °C (°F) | 5.3 (41.5) |
5.6 (42.1) |
7.7 (45.9) |
10.1 (50.2) |
13.3 (55.9) |
16.2 (61.2) |
18.5 (65.3) |
18.2 (64.8) |
15.4 (59.7) |
11.9 (53.4) |
8.0 (46.4) |
5.6 (42.1) |
11.3 (52.3) |
| Average low °C (°F) | 2.0 (35.6) |
2.0 (35.6) |
3.5 (38.3) |
5.1 (41.2) |
8.2 (46.8) |
11.0 (51.8) |
13.2 (55.8) |
13.0 (55.4) |
10.5 (50.9) |
7.8 (46.0) |
4.3 (39.7) |
2.3 (36.1) |
6.9 (44.4) |
| Record low °C (°F) | −12.6 (9.3) |
−11.8 (10.8) |
−8.3 (17.1) |
−4.2 (24.4) |
−1.5 (29.3) |
1.5 (34.7) |
5.3 (41.5) |
4.3 (39.7) |
−1.6 (29.1) |
−5.4 (22.3) |
−6.6 (20.1) |
−12.0 (10.4) |
−12.6 (9.3) |
| Average precipitation mm (inches) | 59.9 (2.36) |
45.4 (1.79) |
39.0 (1.54) |
43.6 (1.72) |
44.6 (1.76) |
49.7 (1.96) |
45.2 (1.78) |
55.1 (2.17) |
51.9 (2.04) |
67.9 (2.67) |
66.0 (2.60) |
59.2 (2.33) |
627.5 (24.70) |
| Average precipitation days (≥ 1.0 mm) | 11.8 | 9.9 | 8.9 | 8.6 | 8.3 | 8.5 | 7.6 | 8.4 | 8.4 | 10.9 | 11.3 | 11.2 | 113.8 |
| Mean monthly sunshine hours | 60.2 | 80.7 | 128.0 | 181.0 | 213.4 | 209.8 | 221.9 | 206.5 | 152.0 | 117.4 | 69.7 | 52.7 | 1,693.2 |
| Source 1: Met Office [30] | |||||||||||||
| Source 2: Starlings Roost Weather[31][32] | |||||||||||||
Hampstead - Weather Station in North London
The weather station enclosure is the most elevated of any in the London area, and as a result daytime temperatures are typically one degree lower than Heathrow, Kew, Northolt and Greenwich.
| Climate data for Hampstead WMO ID: 99139; coordinates 51°33′38″N 0°10′48″W; elevation: 137 m (449 ft); 1991–2020 normals, extremes 1910–2016 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 15.7 (60.3) |
18.3 (64.9) |
22.8 (73.0) |
27.2 (81.0) |
30.0 (86.0) |
33.7 (92.7) |
34.4 (93.9) |
37.4 (99.3) |
33.9 (93.0) |
28.9 (84.0) |
20.0 (68.0) |
15.6 (60.1) |
37.4 (99.3) |
| Average high °C (°F) | 7.5 (45.5) |
8.1 (46.6) |
10.9 (51.6) |
14.1 (57.4) |
17.3 (63.1) |
20.4 (68.7) |
22.7 (72.9) |
22.3 (72.1) |
19.1 (66.4) |
14.8 (58.6) |
10.6 (51.1) |
7.8 (46.0) |
14.7 (58.5) |
| Daily mean °C (°F) | 4.9 (40.8) |
5.2 (41.4) |
7.3 (45.1) |
9.8 (49.6) |
12.8 (55.0) |
15.8 (60.4) |
18.0 (64.4) |
17.8 (64.0) |
15.1 (59.2) |
11.6 (52.9) |
7.8 (46.0) |
5.3 (41.5) |
10.9 (51.6) |
| Average low °C (°F) | 2.3 (36.1) |
2.3 (36.1) |
3.7 (38.7) |
5.5 (41.9) |
8.3 (46.9) |
11.2 (52.2) |
13.3 (55.9) |
13.4 (56.1) |
11.1 (52.0) |
8.3 (46.9) |
5.0 (41.0) |
2.7 (36.9) |
7.3 (45.1) |
| Record low °C (°F) | −12.2 (10.0) |
−12.8 (9.0) |
−8.9 (16.0) |
−5.6 (21.9) |
−1.7 (28.9) |
1.7 (35.1) |
4.2 (39.6) |
4.5 (40.1) |
0.6 (33.1) |
−3.3 (26.1) |
−6.1 (21.0) |
−8.4 (16.9) |
−12.8 (9.0) |
| Average precipitation mm (inches) | 69.5 (2.74) |
51.4 (2.02) |
42.8 (1.69) |
49.6 (1.95) |
50.5 (1.99) |
58.5 (2.30) |
50.5 (1.99) |
67.7 (2.67) |
59.1 (2.33) |
78.6 (3.09) |
75.7 (2.98) |
68.3 (2.69) |
722.1 (28.43) |
| Average precipitation days (≥ 1.0 mm) | 12.1 | 10.7 | 9.1 | 9.1 | 8.5 | 8.7 | 8.4 | 9.3 | 9.0 | 11.0 | 11.9 | 11.9 | 119.6 |
| Mean monthly sunshine hours | 60.0 | 76.1 | 114.2 | 155.2 | 199.2 | 193.7 | 199.8 | 188.3 | 145.5 | 106.3 | 67.2 | 54.0 | 1,559.4 |
| Source 1: Met Office[33] | |||||||||||||
| Source 2: KNMI [34] Starlings Roost Weather[35][36] | |||||||||||||
Northolt - Airfield Weather Station in the North West of London
Temperature extremes range from 37.7 °C (99.9 °F) in August 2003, down to −16.1 °C (3.0 °F) in January 1962.
| Climate data for RAF Northolt WMO ID: 03672; coordinates 51°32′55″N 0°25′01″W; elevation: 40 m (131 ft); 1991–2020 normals, extremes 1948–present | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 16.2 (61.2) |
20.8 (69.4) |
24.1 (75.4) |
28.9 (84.0) |
30.6 (87.1) |
35.0 (95.0) |
40.0 (104.0) |
37.7 (99.9) |
32.7 (90.9) |
29.0 (84.2) |
18.8 (65.8) |
16.8 (62.2) |
40.0 (104.0) |
| Average high °C (°F) | 8.2 (46.8) |
8.8 (47.8) |
11.6 (52.9) |
14.8 (58.6) |
18.1 (64.6) |
21.2 (70.2) |
23.5 (74.3) |
23.1 (73.6) |
20.0 (68.0) |
15.6 (60.1) |
11.3 (52.3) |
8.6 (47.5) |
15.4 (59.7) |
| Daily mean °C (°F) | 5.1 (41.2) |
5.4 (41.7) |
7.6 (45.7) |
10.0 (50.0) |
13.2 (55.8) |
16.2 (61.2) |
18.4 (65.1) |
18.1 (64.6) |
15.3 (59.5) |
11.8 (53.2) |
7.9 (46.2) |
5.5 (41.9) |
11.2 (52.2) |
| Average low °C (°F) | 2.0 (35.6) |
2.0 (35.6) |
3.5 (38.3) |
5.2 (41.4) |
8.3 (46.9) |
11.3 (52.3) |
13.4 (56.1) |
13.2 (55.8) |
10.6 (51.1) |
7.9 (46.2) |
4.5 (40.1) |
2.3 (36.1) |
7.0 (44.6) |
| Record low °C (°F) | −16.1 (3.0) |
−13.9 (7.0) |
−8.0 (17.6) |
−4.7 (23.5) |
−2.7 (27.1) |
0.0 (32.0) |
4.4 (39.9) |
3.0 (37.4) |
0.0 (32.0) |
−5.5 (22.1) |
−7.5 (18.5) |
−17.4 (0.7) |
−17.4 (0.7) |
| Average precipitation mm (inches) | 62.9 (2.48) |
49.1 (1.93) |
42.4 (1.67) |
45.6 (1.80) |
51.8 (2.04) |
50.2 (1.98) |
48.6 (1.91) |
56.6 (2.23) |
51.4 (2.02) |
70.2 (2.76) |
71.4 (2.81) |
63.1 (2.48) |
663.3 (26.11) |
| Average precipitation days (≥ 1.0 mm) | 11.6 | 10.1 | 9.1 | 9.4 | 8.6 | 8.6 | 8.1 | 9.4 | 8.5 | 10.7 | 11.6 | 11.3 | 117.0 |
| Source 1: Met Office [37] | |||||||||||||
| Source 2: Starlings Roost Weather[38][39] | |||||||||||||
Greenwich - Weather Station in South East London near the river Thames
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Record high °C (°F) | 16.8 (62.2) |
19.7 (67.5) |
23.3 (73.9) |
25.3 (77.5) |
29.0 (84.2) |
34.5 (94.1) |
35.3 (95.5) |
37.5 (99.5) |
30.2 (86.4) |
26.1 (79.0) |
18.9 (66.0) |
16.4 (61.5) |
37.5 (99.5) |
| Average high °C (°F) | 8.5 (47.3) |
9.2 (48.6) |
12.1 (53.8) |
15.4 (59.7) |
18.6 (65.5) |
21.4 (70.5) |
23.8 (74.8) |
23.3 (73.9) |
20.3 (68.5) |
15.8 (60.4) |
11.6 (52.9) |
8.9 (48.0) |
15.8 (60.4) |
| Daily mean °C (°F) | 5.9 (42.6) |
6.2 (43.2) |
8.4 (47.1) |
10.7 (51.3) |
13.8 (56.8) |
16.7 (62.1) |
18.8 (65.8) |
18.7 (65.7) |
15.9 (60.6) |
12.4 (54.3) |
8.8 (47.8) |
6.3 (43.3) |
11.9 (53.4) |
| Average low °C (°F) | 3.4 (38.1) |
3.2 (37.8) |
4.7 (40.5) |
6.0 (42.8) |
9.1 (48.4) |
12.0 (53.6) |
13.9 (57.0) |
14.1 (57.4) |
11.6 (52.9) |
9.0 (48.2) |
6.1 (43.0) |
3.8 (38.8) |
8.1 (46.6) |
| Record low °C (°F) | −12.7 (9.1) |
−9.4 (15.1) |
−6.7 (19.9) |
−4.8 (23.4) |
−1.0 (30.2) |
1.1 (34.0) |
5.0 (41.0) |
5.3 (41.5) |
1.1 (34.0) |
−2.1 (28.2) |
−8.0 (17.6) |
−10.5 (13.1) |
−12.7 (9.1) |
| Average precipitation mm (inches) | 43.9 (1.73) |
39.9 (1.57) |
36.5 (1.44) |
38.6 (1.52) |
44.0 (1.73) |
49.3 (1.94) |
36.3 (1.43) |
53.0 (2.09) |
52.4 (2.06) |
58.3 (2.30) |
59.9 (2.36) |
50.7 (2.00) |
562.9 (22.16) |
| Average precipitation days (≥ 1.0 mm) | 10.5 | 9.2 | 7.9 | 8.1 | 7.9 | 7.8 | 7.1 | 8.2 | 7.9 | 10.3 | 10.6 | 10.2 | 105.6 |
| Mean monthly sunshine hours | 44.4 | 66.1 | 109.7 | 152.9 | 198.7 | 198.6 | 209.2 | 198.0 | 140.6 | 99.7 | 58.5 | 50.1 | 1,526.4 |
| Source 1: Met Office[40][41][42] | |||||||||||||
| Source 2: Starlings Roost Weather[43][44] | |||||||||||||
Average UV index
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 4 | 5 | 6 | 6 | 5 | 4 | 2 | 1 | 0 | 3.4 |
Notes
- Also called marine west coast.
- Mid-latitude temperate maritime climate
References
- Peel, M.C.; Finlayson, B.L. "World Map of Köppen-Geiger climate classification". The University of Melbourne. Archived from the original on 13 January 2015. Retrieved 27 June 2020.
- "Monthly precipitation totals KEW GARDENS 1697- 1987". Wetterzentrale.de. Archived from the original on 24 February 2021. Retrieved 13 September 2020.
- "Temperaturmonatsmittel GREENWICH/MARITIME M 1841- 1960". Archived from the original on 31 July 2020. Retrieved 13 September 2020.
- "Heathrow". CEDA Archive. Archived from the original on 28 September 2022. Retrieved 13 September 2020.
- "Hampstead". CEDA Archive. Archived from the original on 28 September 2022. Retrieved 13 September 2020.
- "Northolt". CEDA Archive. Archived from the original on 28 September 2022. Retrieved 13 September 2020.
- "St James's park". CEDA Archive. Archived from the original on 29 September 2022. Retrieved 13 September 2020.
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